Abstract: The paper aims to study the effects of different nutrient solution formulations on soil characteristics, growth, quality and yield of pepper in sunlight greenhouse, and select the optimal nutrient solution formulation for the soil cultivation pepper in Ningxia solar greenhouse.‘Hangjiao5’was used as the test material, and four different nutrient solution formulations were set, which were target yield (T1), 1/2 garden formula (T2), former selected formula (T3), common formula used by Northwest farmers’(CK), to determine the soil nutrients, soil enzyme activity, plant growth and pepper quality under different treatments. The results showed that T2 treatment increased soil organic matter content, reduced pH and EC value, improved soil enzyme activity, promoted the nutrition growth of pepper and improved pepper quality, Vc content was 26.3% higher than that of CK, soluble protein content was 4.3% higher than that of CK, and soluble sugar content was 22.7% higher than that of CK, the yield reached 39531 kg/hm2, which was 14.5% higher than that of CK. During the whole growth period of pepper, compared with CK, the total amount of nitrogen fertilizer decreased by 7.5% to 33.7% under all treatments, phosphate fertilizer decreased by 54.24% to 70.28% and potassium fertilizer increased by 13.4% to 41.3%% . The 1/2 garden formula is the optimal nutrient solution for soil cultivation pepper in Ningxia solar greenhouse.